WO2004012476A3 - Electrical impedance based audio compensation in audio devices and methods therefor - Google Patents

Electrical impedance based audio compensation in audio devices and methods therefor Download PDF

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Publication number
WO2004012476A3
WO2004012476A3 PCT/US2003/023008 US0323008W WO2004012476A3 WO 2004012476 A3 WO2004012476 A3 WO 2004012476A3 US 0323008 W US0323008 W US 0323008W WO 2004012476 A3 WO2004012476 A3 WO 2004012476A3
Authority
WO
WIPO (PCT)
Prior art keywords
audio
compensation
electrical impedance
sound transducer
mismatch
Prior art date
Application number
PCT/US2003/023008
Other languages
French (fr)
Other versions
WO2004012476A2 (en
Inventor
Jose Ricardo Baddini Mantovani
Original Assignee
Motorola Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Priority to BR0312974-8A priority Critical patent/BR0312974A/en
Priority to EP03771740A priority patent/EP1552608A4/en
Priority to AU2003256688A priority patent/AU2003256688A1/en
Publication of WO2004012476A2 publication Critical patent/WO2004012476A2/en
Publication of WO2004012476A3 publication Critical patent/WO2004012476A3/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H03G5/18—Automatic control in untuned amplifiers
    • H03G5/22—Automatic control in untuned amplifiers having semiconductor devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones

Abstract

An audio device, for example a wireless communications handset, including a sound transducer (410) coupled to a compensated audio signal output of an audio compensator (450), a mismatch detection circuit (430) having a first input coupled to the compensated audio signal output of the audio compensator (450), the mismatch detection circuit (430) having a second input coupled to the sound transducer (410), the mismatch detecting circuit having an output corresponding to a mismatch between a reference electrical impedance of the sound transducer and an actual electrical impedance of the sound transducer, a compensation estimator (440) having an input coupled to the output of the mismatch detection circuit, the compensation estimator having an audio compensation output coupled to a compensation input of the audio compensator.
PCT/US2003/023008 2002-07-26 2003-07-22 Electrical impedance based audio compensation in audio devices and methods therefor WO2004012476A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BR0312974-8A BR0312974A (en) 2002-07-26 2003-07-22 Electrical Impedance-Based Audio Compensation in Audio Devices and Methods
EP03771740A EP1552608A4 (en) 2002-07-26 2003-07-22 Electrical impedance based audio compensation in audio devices and methods therefor
AU2003256688A AU2003256688A1 (en) 2002-07-26 2003-07-22 Electrical impedance based audio compensation in audio devices and methods therefor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/206,704 2002-07-26
US10/206,704 US20040017921A1 (en) 2002-07-26 2002-07-26 Electrical impedance based audio compensation in audio devices and methods therefor

Publications (2)

Publication Number Publication Date
WO2004012476A2 WO2004012476A2 (en) 2004-02-05
WO2004012476A3 true WO2004012476A3 (en) 2004-05-21

Family

ID=30770348

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/023008 WO2004012476A2 (en) 2002-07-26 2003-07-22 Electrical impedance based audio compensation in audio devices and methods therefor

Country Status (9)

Country Link
US (1) US20040017921A1 (en)
EP (1) EP1552608A4 (en)
KR (1) KR20050026967A (en)
CN (1) CN1682441A (en)
AU (1) AU2003256688A1 (en)
BR (1) BR0312974A (en)
RU (1) RU2317656C2 (en)
TW (1) TWI314392B (en)
WO (1) WO2004012476A2 (en)

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CN104602175A (en) * 2013-10-30 2015-05-06 索尼公司 Kennelly circle interpolation method for measuring impedance
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Title
See also references of EP1552608A4 *

Also Published As

Publication number Publication date
AU2003256688A1 (en) 2004-02-16
CN1682441A (en) 2005-10-12
EP1552608A2 (en) 2005-07-13
BR0312974A (en) 2005-06-14
TWI314392B (en) 2009-09-01
US20040017921A1 (en) 2004-01-29
RU2005105315A (en) 2005-07-20
KR20050026967A (en) 2005-03-16
TW200415845A (en) 2004-08-16
AU2003256688A8 (en) 2004-02-16
WO2004012476A2 (en) 2004-02-05
EP1552608A4 (en) 2007-06-06
RU2317656C2 (en) 2008-02-20

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